GB2015207A - Improvements relating to electric alarm clocks - Google Patents

Improvements relating to electric alarm clocks

Info

Publication number
GB2015207A
GB2015207A GB7904896A GB7904896A GB2015207A GB 2015207 A GB2015207 A GB 2015207A GB 7904896 A GB7904896 A GB 7904896A GB 7904896 A GB7904896 A GB 7904896A GB 2015207 A GB2015207 A GB 2015207A
Authority
GB
United Kingdom
Prior art keywords
gear
shaft
alarm
hour
alarm set
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7904896A
Other versions
GB2015207B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
METAMEC Ltd
Original Assignee
METAMEC Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by METAMEC Ltd filed Critical METAMEC Ltd
Publication of GB2015207A publication Critical patent/GB2015207A/en
Application granted granted Critical
Publication of GB2015207B publication Critical patent/GB2015207B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
    • G04C21/20—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

In an electric alarm clock in which an alarm set hand (not shown) attached to an alarm set gear and sleeve 40, 41 is used in a conventional manner to set the alarm time, the alarm set gear being provided e.g. with pegs 43 which locate in corresponding apertures 44 in an hour gear 37 once per revolution of the hour gear, the hour gear 37 is biassed towards the alarm set gear 40 by virtue of the action of a leaf spring 45 acting on the end of a shaft 15. The leftwards bias imparted on the shaft 15 is transferred via gear combination 25/26, which is a friction fit on shaft 15, through gears 32/34 to the hour gear 37, thus resulting in a particularly simple construction. The leaf spring 45 also acts as an electric switch contact, energising an audible alarm (not shown) when the shaft 15 moves leftwards. As shown, all the gears in the gear train are mounted on just two shafts, 14 and 15. The clock is driven by a stepping motor having its rotor 22 freely mounted on the shaft 14 and whose stator coil 18 receives pulses derived from a quartz crystal on circuit board 13. <IMAGE>
GB7904896A 1978-02-17 1979-02-12 Electric alarm clocks Expired GB2015207B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB650278 1978-02-17

Publications (2)

Publication Number Publication Date
GB2015207A true GB2015207A (en) 1979-09-05
GB2015207B GB2015207B (en) 1982-04-07

Family

ID=9815680

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7904896A Expired GB2015207B (en) 1978-02-17 1979-02-12 Electric alarm clocks

Country Status (2)

Country Link
DE (1) DE7903964U1 (en)
GB (1) GB2015207B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105825601A (en) * 2016-04-25 2016-08-03 广东祥福电子科技有限公司 Hand emergency signaling apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105825601A (en) * 2016-04-25 2016-08-03 广东祥福电子科技有限公司 Hand emergency signaling apparatus

Also Published As

Publication number Publication date
GB2015207B (en) 1982-04-07
DE7903964U1 (en) 1979-08-02

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee